Aston Martin V12 Vantage Turn Signal Bulb Size

The Aston Martin V12 Vantage front turn signal uses a 3157NA bulb size for the replacement component. The replacement chart covers vehicle production spanning 2010 to 2017.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Front Turn Signal

Years	Bulb Size
2015-2017	3157NA
2010-2013	3157NA

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.	3157NA

Other Locations

Additional Notes

The 3157NA is the sole bulb type listed across all front turn signal positions in the Aston Martin V12 Vantage specifications, covering model years 2010-2013 and 2015-2017.
The 3157NA follows the ANSI standardization system, which is the North American bulb classification framework used in the United States and Canada.
The bulb operates on a dual-filament design within a T25 wedge base, meaning a single unit serves two distinct brightness levels from one housing.
The 3157NA carries a 12-volt rating with a wattage split of 27W for the high-intensity filament and 7W for the low-intensity filament, reflecting its dual-function role in signaling applications.
The natural amber glass of the 3157NA produces its amber output through the glass envelope itself rather than through a coated or painted lens, which is the defining characteristic of the "NA" suffix in the ANSI designation.
The 3157NA designation is distinct from the standard 3157, which uses a clear glass envelope. Substituting a clear 3157 in place of a 3157NA would alter the color output at the lens, a relevant fitment consideration for vehicles where amber compliance is required.
The T25 wedge base format of the 3157NA is a push-in connector type, meaning it does not use a bayonet or screw base, and socket compatibility is specific to that base configuration.